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An analytical damage tolerance method accounting for delamination in compression-loaded composites

Bogenfeld, Raffael Marius and Freund, Sebastian and Schuster, Andreas (2020) An analytical damage tolerance method accounting for delamination in compression-loaded composites. Engineering Failure Analysis (118). Elsevier. doi: 10.1016/j.engfailanal.2020.104875. ISSN 1350-6307.

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Official URL: https://doi.org/10.1016/j.engfailanal.2020.104875


An efficient damage tolerance (DT) analysis method is required for application during the pre- liminary design phase of a composite structure. In the present work, we describe an analytical, energy-based DT analysis method for compression-loaded composite laminates containing a delamination. Based on the sublaminate buckling as the driving phenomenon, the strain energy release rate is calculated through the virtual crack extension method. The consideration of the load transfer within the laminate allows calculating the strain energy release rate in two direc- tions which permits an assessment of the damage propagation direction. Further, the developed method permits taking into account the effects of the laminate width and the damage eccen- tricity. The obtained results are compared with other analysis approaches and validated through experiments from the literature. This validation approves the method's capability to assess the residual laminate properties, although the method turned out to be less accurate than methods presented in the literature.

Item URL in elib:https://elib.dlr.de/136180/
Document Type:Article
Title:An analytical damage tolerance method accounting for delamination in compression-loaded composites
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Bogenfeld, Raffael MariusRaffael.Bogenfeld (at) dlr.dehttps://orcid.org/0000-0003-3883-269X
Freund, SebastianSebastian.Freund (at) dlr.deUNSPECIFIED
Schuster, AndreasAndreas.Schuster (at) dlr.deUNSPECIFIED
Date:December 2020
Journal or Publication Title:Engineering Failure Analysis
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.engfailanal.2020.104875
EditorsEmailEditor's ORCID iD
Keywords:Damage Tolerance, Delamination, Damage growth, preliminary aircraft design
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation (old), L - Structures and Materials (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Structural Mechanics
Deposited By: Bogenfeld, Raffael Marius
Deposited On:28 Sep 2020 08:26
Last Modified:28 Sep 2020 08:26

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